Young Jimmy, a British lad whose family relocated to the USA, finds himself ostracized by his peers -- and teachers. After being humiliated at band practice, he flees into the woods, where his flute comes to life. Jimmy and Freddie the flute stumble onto a boat (owned by evil Witchipoo), which takes them to Living Island. Witchipoo has spotted the magical, talking flute, and plans to steal it to impress the visiting witch convention and land herself the Witch of the Year Award. But Jimmy's new friends, Mayor H.R. Pufnstuf and the other inhabitants of Living Island, set out to foil Witchipoo's plans.

After the cancellation of "H.R. Pufnstuf," makers Sid and Marty Krofft gave the story one final hurrah on the big-screen. The movie seems to be a prequel to the series (though in an episode of the show, Witchipoo stated that she'd never met Boss Witch). Along with the majority of principles from the series, Martha Raye appears as Boss Witch and singer Mama Cass Elliot portrays Witch Hazel. As a result of her appearance in this film, Martha Raye landed the lead role of Benita Bizarre in the Krofft's next series, "The Bugaloos." The movie fared poorly in theatres and basically disappeared until the mid-90s, when it finally got a brief VHS release and some airings on The Disney Channel. The official video is now hard to find, but the film continues to air on occasion on cable.